docs: def generate_order_template(self, quote_id, extra, quantity=1):
          """Generate a complete order template.
  
          :param int quote_id: ID of target quote
          :param dictionary extra: Overrides for the defaults of SoftLayer_Container_Product_Order
          :param int quantity: Number of items to order.
          """
  
          if not isinstance(extra, dict):
              raise ValueError("extra is not formatted properly")
  
          container = self.get_order_container(quote_id)
  
          container['quantity'] = quantity
          for key in extra.keys():
              container[key] = extra[key]
  
          return container